BRIT Press. (2018). Intermountain Flora: Vascular Plants of the Intermountain West, U.S.A. Volume 7, Potpourri: Keys, History, Authors, Artists, Collectors, Beardtongues, Glossary, Indices. Journal of the Botanical Research Institute of Texas, 12(2), 548. Retrieved from https://journals.brit.org/jbrit/article/view/958